Adjustable rat fixing device

The invention provides an adjustable rat fixing device including a pedestal and a cover board box. The rear end of the cover board box is provided with a rat tail outlet. The two sides of the pedestal are provided with fixation adjusting devices. Pressing bars are mounted on two sides in the cover board box. Fixation adjusting grooves are arranged in side faces of the cover board box and at positions corresponding to the fixation adjusting devices. The cover board box also includes a length adjusting groove arranged at the front end of the cover board box. A length adjusting slide assembly is mounted in the length adjusting groove in a sliding manner. Through the above arrangement, a rat can be fixed in the vertical direction and in the length direction. The invention well solves a problem that a prior rat fixing device cannot be adjusted according to the sizes of rats and the device provided by the invention is simple in operation and high in practicability. 本发明提供可调式大鼠固定装置，包括底座、盖板盒、盖板盒的后端设有鼠尾出口；所述底座两侧设有固定调节装