[Objective] To screen a psychrotolerant cellulase-producing strain from the decayed soil of Huanglong Mountain,Sichuan,China,and determine the properties of the cellulase.[Methods] The strain was identified by the morphology and ITS sequence analysis.The DNS method was used to determine the activity of cellulases.[Results] A psychrotolerant cellulase-producing strain HD1031 was screened from the decayed soil of Huanglong Mountain.It was identified as Pseudogymnoascus roseus by the morphology and ITS sequenc...