The invention discloses a modified collecting device of agricultural organic fertilizer which comprises a urine pool fixedly mounted on a wall body and a water pool provided in the wall body, whereinthe water pool is located above the urine pool and a mouth groove is provided at the lower end of the water tank; a clean pipe communicated with the urine tank is fixedly provided at the lower end ofthe mouth groove with; a water pressure pipe communicated with the water storage tank connecting with the inside of the water pool is installed on the upper end of the water pool; a water gate is provided on the water pressure pipe; a first sliding groove extending left and right is provided in the ground; a first sliding bar slidably left and right installed in the first sliding groove; a through-connecting groove penetrating up-down is provided at the left end of the first sliding bar; a first bevel cut is provided at the upper end of the left end wall of the through-connecting groove; a second bevel cut is provided at the lower end of the right end wall of the through-connecting groove; a conical cavity with a port upwards is further provided in the first sliding bar.