A theme park worker told Beijing Times on Tuesday that an "accidental breakdown in machinery" was the cause of the incident.
Video shows a large number of tourists floating in the park's "tsunami pool" - many inside inner tubes - when the large wave begins.
A notice from local government says the wave was caused by electrical problems that damaged equipment in the control room, according to the Morning Post.
La piscine à vague se dérègle, un "tsunami" fait 44 blessés — Chine
Les autorités chinoises ont fait état de 44 blessés , dont 3 graves, avec des écorchures importantes, et des fractures. D'après les précisions apportées par LCI , un " tsunami " de plus de 3 mètres de haut a été généré par la machine.
In the same year, four-year-old Carlos Flores drowned at a brand new wave pool at the Great America amusement park despite the presence of six lifeguards in the vicinity.
A terrifying incident has occurred at Shuiyun Waterpark, a very popular tourist destination in Northern China. Screams of terror and shock can be heard as the wave sweeps across the pool, leaving some with contusions and fractured ribs in its wake.
44 people were injured and the case is in further investigation. It's already been fixed and will be open tomorrow'.
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In a statement, the water park claimed only around 10 people were injured, falling short of the official count of 44, with reports of people remaining in hospital with broken bones and suspected serious injuries.
It is unclear whether the injured tourists were refunded their tickets, which cost 98 RMB (£11.70).
Just last week, a roller coaster at Alton Towers in the United Kingdom also malfunctioned.
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The ride was stuck for around 20 minutes, according to eyewitnesses. It was found that "human error" lead to the "catastrophic failure".