Combined type unit cultivation automatic purification and pollution discharge system

The utility model discloses a combined unit cultivation automatic purification blowdown system which comprises a cultivation barrel, a fixed pipe, a telescopic pipe, a lifting air cylinder, a pipe lifting support and a liquid level indicating assembly, a drainage piece used for collecting dirt and absorbing slag is arranged at the bottom of an inner cavity of the cultivation barrel, the bottom of the cultivation barrel is connected with an underflow pipe, the lower end of the fixed pipe is connected with the underflow pipe, and the lower end of the telescopic pipe is connected with the liquid level indicating assembly. The upper end of the fixing pipe is connected with the lower end of the telescopic pipe, the pipe lifting support is arranged at the upper end of the telescopic pipe and connected with a telescopic rod of the lifting air cylinder, a water collecting barrel is arranged at the position of the telescopic pipe, the liquid level indicating assembly comprises a graduated scale and an indicating point