Tilt angle performance detecting instrument of hydrological current measuring instrument

The invention provides a tilt angle performance detecting instrument of a hydrological current measuring instrument. The tilt angle performance detecting instrument comprises a worktable, a table topbase plate, limiting baffles, an HV series horizontal and vertical dual-purpose high-precision index plate, a side link, a pressing block, a connecting angle plate and a three-dimensional current meter fixture, the table top base plate is arranged on the worktable, the HV series horizontal and vertical dual-purpose high-precision index plate is fixed to the table top base plate through the pressing block and a fastener, the limiting baffles are divided into two groups and are respectively fixed on both sides of the high-precision index plate, the high-precision index plate is transferred to the three-dimensional current meter fixture through the connecting angle plate, the connecting angle plate comprises two mutually perpendicular connecting surfaces, one of which is connected with the high-precision index plate,