The 2×8 element MnCoNiOdetector array was successfully fabricated with photolithography and wet-chemical etching process. It was shown that the negative temperature coefficient of resistance of the film reaches -3.8% K-1 at room temperature. The typical element of the fabricated detector array exhibits responsivity of about 107V/W and detectivity of about 2×107cmHz1/2/W respectively at bias voltage of ±15V and chopping frequency of 10Hz. The response uniformity of the linear array bolometers is about 5.9%. Our results proved the feasibility of MnCoNiOfilms for linear array bolometer applications, which can possibility be used as new-type uncooled bolometer detectors.