Excrement collecting device of metabolism cage

The utility model discloses an excrement collecting device of a metabolism cage. The excrement collecting device comprises an operation table and a mouse cage fixed on the operation table, the devicefurther comprises a support, a separator, a funnel, a urine collecting ring, an excrement pipe and a variable-volume urine collecting pipe. The bracket is arranged below the operation table; the funnel is fixed below the operating table; the separator is coaxially arranged in the funnel; the outer diameter of an upper opening of the separator is smaller than that of a lower opening of the separator; the outer diameter of the lower opening of the separator is greater than the inner diameter of the neck of the funnel; a groove is formed in the upper surface of the urine collecting ring, and thelower opening of the funnel is located in the groove of the urine collecting ring; the urine collecting ring is obliquely arranged; the excrement pipe penetrates through the urine collecting ring, isarranged below the funnel a